CS8126 Cherry Semiconductor Corporation, CS8126 Datasheet

CS8126

Manufacturer Part Number

CS8126

Description

5V/ 750mA Low Dropout Linear Regulator with Delayed RESET

Manufacturer

Cherry Semiconductor Corporation

Datasheet

1.CS8126.pdf (9 pages)

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Rev. 5/4/99

Delay

Gnd

The CS8126 is a low dropout, high cur-

rent 5V linear regulator. It is an

improved replacement for the CS8156.

Improvements include higher accuracy,

tighter saturation control, better supply

rejection, and enhanced

ry. Familiar PNP regulator features

such as reverse battery protection, over-

voltage shutdown, thermal shutdown,

and current limit make the CS8126 suit-

able for use in automotive and battery

operated equipment. Additional on-

chip filtering has been included to

enhance rejection of high frequency

transients on all external leads.

An active microprocessor

tion is included on-chip with externally

programmable delay time. During

power-up, or after detection of any

error in the regulated output,

the

RESET

5V, 750mA Low Dropout Linear Regulator

Regulator

lead will remain in the low

Pre-

Charge

Current

Generator

Discharge

Regulated Supply

for Circuit Bias

RESET

Discharge

Latching

RESET

Description

Reference

Shutdown

Bandgap

Thermal

circuit-

Block Diagram

Comparator

func-

Reset

with Delayed RESET

Over Voltage

Shutdown

state for the duration of the delay.

Types of errors include short circuit,

low input voltage, overvoltage shut-

down, thermal shutdown, or others that

cause the output to become unregulat-

ed. This function is independent of the

input voltage and will function correct-

ly with an output voltage as low as 1V.

Hysteresis is included in both the reset

and Delay comparators for enhanced

noise immunity. A latching discharge

circuit is used to discharge the Delay

capacitor, even when triggered by a rel-

atively short fault condition. This circuit

improves upon the commonly used

SCR structure by providing full capaci-

tor discharge (0.2V type).

Note:The CS8126 is lead compatible

with the LM2925, TLE4260, L4947,

LM2927, and LM2926.

CS8126,-1,-2

Error

Amp

Anti-Saturation

Current Limit

Comparator

and

Delay

RESET

OUT

2000 South County Trail, East Greenwich, RI 02818

7 L D

Tel: (401)885-3600 Fax: (401)885-5786

1 V

2 V

3 V

4 Gnd

5 Delay

6 RESET

7 NC

Cherry Semiconductor Corporation

Tab (Gnd)

Web Site: www.cherry-semi.com

Low Dropout Voltage

(0.6V at 0.5A)

3% Output Accuracy

Active

External

Protection Circuitry

Email: info@cherry-semi.com

OUT

OUT(SENSE)

Package Options

ÐÐÐÐÐÐ

RESET

PAK

16 Lead SOIC Wide

Delay

Reverse Battery

Protection

+60V, -50V Peak

Transient Voltage

Short Circuit Protection

Internal Thermal

Overload Protection

for Reset

Features

RESET

CS8126-1

1 V

2 V

3 Gnd

4 Delay

5 RESET

5 L TO-220

OUT

Tab (Gnd)

Delay

Gnd

OUT

OUT(SENSE)

CS8126-2

Company

1 V

2 RESET

3 Gnd

4 Delay

5 V

OUT

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